title: Production of [14C]acetylcholine and [14C]carbon dioxide from [U-14C]glucose in tissue prisms from aging rat brain.
abstract: Production of [14C]acetylcholine and 14CO2 was examined by using tissue prisms from neocortex, hippocampus, and striatum from rats aged approximately 5 months, 13 months, and 27 months. [14C]Acetylcholine synthesis in the striatum showed highly significant decreases with age for measurements in the presence of both 5 mM- and 31 mM-K+, contrasting with the lack of significant change in 14CO2 production in this region. The neocortex and hippocampus showed only small changes, especially when comparison was made between 13-month and senescent animals. Measurements of the release of [14C]acetylcholine and influence of atropine on this release confirmed the relative stability with age of the cholinergic system in the neocortex.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism*; D000375:Aging; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D005947:Glucose / Q000378:metabolism*; D008297:Male; D011188:Potassium / Q000494:pharmacology; D051381:Rats; D014018:Tissue Distribution
chemical_list: D002245:Carbon Dioxide; D001285:Atropine; D005947:Glucose; D000109:Acetylcholine; D011188:Potassium